Sprayer for fire-hose and the like.



J. B. MARSHALL. SPRAYER FOR-FIRE HOSE AND THE LIKE.

APPLIUATION FILED JAN. 23, 1912,

Patented Sept. 3, 1912 WITNESSES fig INVENTOR 61/4.

. V n I ATTORNgy what km? JOHN B. MARSHALL, OF SAN FRANCISCO, CALIFORNIA.

SPRAYER FOR FIRE-HOSE AND THE LIKE.

Specification of Letters Patent.

Patented Sept. 3, 1912.

Application filed January 23, 1912. Serial No. 672,956.

To all whom it may concern:

Be it known that I, JOHN B. MARSHALL,

a citizen of the United States, residing at San Francisco, in the county of San Francisco and State of California, have invented new and useful Improvements in Sprayers for Fire-Hose and the Like, of which the following is a specification.

The object of the present invention is to provide, in combination with a nozzle of a iire hose, a spraying or sprinkling device attached tosaid fire hose, for the purpose of sprinkling or spraying the fireman operating the hose, the ad acent battery, or other lire extinguishing mechanism, so as to prevent the fireman and said-battery or mechanism being scorched by the great heat of the conflagration.

A. further object of the invention is to provide an improved construction of sprayer which will discharge a very fine spray through a large extent of surrounding space.

In the accompanying drawing, Figure 1 is a vertical section of my improved sprayer; Fig. 2 is a plan view thereof, the nozzle being removed; Fig. 3 is a side View of a nozzle of a fire hose, showing my improved sprayer applied thereto.

Referring to the drawing, 1 indicates a tube, threaded externally at one end, as shown at 2. From the other end of said tube extends an annular flange 3, the outer edge of which is threaded, as shown at 4. The threaded end of the tube passes through an aperture 5 in the end 6 of a cylinder 7 the external surface of which is milled, as shown at 8, or otherwise suitably formed, to permit said cylinder to be conveniently turned. The wall of the cylinder, next said end 6, is internally threaded, as shown at 9, to permit the threaded edge of the flange to be screwed therein, and, at the end remote from said end 6, the said wall is reduced in thickness on the inside, so as to form an internal shoulder 10. Upon said shoulder. 10 rests the circular margin of a disk 11, which disk is clamped against said flange 12 extending from a nozzle 13 and screwed into said reduced portion of said wall. Said nozzle is formed with a central hole 14, the interior and exterior surfaces of said nozzle being conical in form. Said diskis formed with two diametrically opposite apertures 15, each extending through said disk in a substantially tangential direction. It is also formed with a central hub 16, which terminates in a conical valve 17 directed toward the tube 1, which is formed with a central conical .or tapering seat 18, adapted to fit snugly upon the conical valve. The outer portion of the flange is formed with a conical face 19 and with a face 20, between the seat and the portion 19,.which is in a plane transverse to the axis of the tube 1. In said face 20 are diametrically opposite sockets 21 to facilitate screwing of the tube 1. In passing through the tangentially directed apertures 15, the liquid is given a tangential or rotary velocity, which, as the liquid is confined within a circuit of constantly decreasin diameter, correspondingly increases, so t at, when emerging from the discharge opening, it issues therefrom in great force and is immediately converted into very fine spray.

In usin'g'the sprayer for the purpose for which it is primarily designed, it is attached to the nozzle 2st of a fire hose, either between the end attached to the fire hose and the shut off valve 25 of said nozzle, as shown in Fig. 3, or screwed into the internally threaded discharge end 26 of said nozzle. In the former case it can be used with or without simultaneous discharge of water from. the nozzle of the fire hose, and, of course, its use can be discontinued at any time by screwing the cylinder 7 to 'close the passage from the tube 1 to the nozzle.

I claim:

1. In combination with an internally threaded cylinder having an end formed with a central aperture, an externally threaded tube passing through said aperture and having, within the cylinder, an externally threaded flange screwed into said oylinder, the inner end of the tube being formed with a valve seat, a tangentiallyy -2. In combination with an internally threaded cylinder having an .end. formed witha central aperture, the part of the wall of said cylinder remote from said aperture sairi reduce part of said wall and I t 11y threw an t and hav am ezternaiiy can cyimder, Witnesses,

am" iOlmfikil 5 @QHIET B: MARSHALL,

In testimony whereof have hereunto set with niiaiiy ager-rtured (113k mulder and mrmeoi Wmnesses:

y mi}; I e adapteci is elosea a1 sis FRANCIE 5L WRIGHT,

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mm; a conicai nozzle screwed clamping said' dik against said. shoulder;

my hand in the presence of twe subscribing 

